What is meant by false easting?

False easting is a term used in cartography and geospatial analysis to describe a horizontal shift applied to the coordinates of a map projection. This adjustment is made to ensure that all points on a map have positive x-coordinates (eastings), which simplifies calculations and representation. For example, in the Universal Transverse Mercator (UTM) system, a false easting of 500,000 meters is added to the coordinates to prevent negative values, making the map easier to work with.